[PATCH 4/7] rust: str: convert `rusttest` tests into KUnit

Miguel Ojeda
2025-05-02T21:52:06Z

In general, we should aim to test as much as possible within the actual
kernel, and not in the build host.

Thus convert these `rusttest` tests into KUnit tests.

Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
---
rust/kernel/str.rs | 10 ++++------
1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/rust/kernel/str.rs b/rust/kernel/str.rs
index 878111cb77bc..cf2caa2db168 100644
--- a/rust/kernel/str.rs
+++ b/rust/kernel/str.rs
@@ -6,7 +6,7 @@
use core::fmt::{self, Write};
use core::ops::{self, Deref, DerefMut, Index};

-use crate::error::{code::*, Error};
+use crate::prelude::*;

/// Byte string without UTF-8 validity guarantee.
#[repr(transparent)]
@@ -572,8 +572,7 @@ macro_rules! c_str {
}};
}

-#[cfg(test)]
-#[expect(clippy::items_after_test_module)]
+#[kunit_tests(rust_kernel_str)]
mod tests {
use super::*;

@@ -622,11 +621,10 @@ fn test_cstr_to_str() {
}

#[test]
- #[should_panic]
- fn test_cstr_to_str_panic() {
+ fn test_cstr_to_str_invalid_utf8() {
let bad_bytes = b"\xc3\x28\0";
let checked_cstr = CStr::from_bytes_with_nul(bad_bytes).unwrap();
- checked_cstr.to_str().unwrap();
+ assert!(checked_cstr.to_str().is_err());
}

#[test]
--
2.49.0